Coil unit



FIG. 1 is a perspective view of coil unit showing our new design;

FIG. 2 is a left side elevation view, with the right side elevation view being a mirror image of the left side elevation view thereof;

FIG. 3 is a front elevation view;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a rear elevation view. 

The ornamental design for coil unit, as shown and described. 